PEO Health Insurance: Costs, Pros & Cons for Small Business

How Does a PEO Work?

A PEO works through co-employment, a contract that divides employer responsibilities between your company and the PEO. NAPEO says that contract is often a client service agreement (CSA). Once it's signed, wages run through the PEO's payroll, and your employees can enroll in the PEO's benefit plans.

The benefits piece is where PEO health plans differ from a plan you buy directly. The PEO sponsors one master health plan covering worksite employees of many client companies. Pooling lots of small employers into one larger plan may give access to large-group-style pricing and plan options, but eligibility, underwriting and state rules vary. Aon notes that carriers want PEOs to run sound underwriting to limit risk in the pool, one reason PEOs screen the groups they take on.

Who uses a PEO?

NAPEO says most businesses that use a PEO have 10–150 employees. Its industry overview (updated September 28, 2026) counts 502 PEOs in the U.S. serving more than 233,000 mostly small and mid-size businesses that employ 5.4 million people, and says 14% of employers with 20 to 499 employees use one. These are trade-association figures, not government data.

The IRS also runs a voluntary Certified PEO (CPEO) program, created by the Tax Increase Prevention Act of 2014. Certification is optional, so ask whether a PEO holds it, and ask your CPA what it means for your taxes.

How Much Does a PEO Cost?

There is no official average PEO fee, only vendor ranges, and the fee comes on top of your health premiums. ADP, a large PEO provider, says admin fees may range from 2%–12% of total payroll, or about $40–$160 per employee per month (article updated July 14, 2026).

ADP calls its pricing risk-adjusted: the quote moves with the services you buy, workforce size, locations, industry, job roles and claims history. Other vendors quote narrower ranges, and NAPEO's FAQ doesn't publish pricing at all. Here's how the published PEO cost ranges compare, with simple arithmetic for a hypothetical 10-employee company with $500,000 in annual payroll:

Treat every number in that table as a vendor quote, not a benchmark. Ask each PEO to split its proposal into health premiums and admin fees so you can compare like with like.

Is health insurance cheaper through a PEO?

Sometimes, but no one can promise it. The pitch for a PEO master health plan is pooling: Aon says large-group pricing is "typically more favorable" than ACA coverage for small groups. Federal rules help explain why pricing can differ. Insured small-group plans must use adjusted community rating and cover the essential health benefits package; large-group coverage isn't subject to those two rules, and its overall price can reflect the group's claims. Whether a given PEO plan is rated as small-group or large-group coverage in your state varies, so get that answer in writing.

The flip side: your group is still priced on risk, the admin fee is added on top, and no verified savings percentage exists. For reference, the small-group premiums we typically saw for 2026 coverage ran roughly $650–$900 per employee per month for single coverage, before the employer and employee split; see our group health insurance cost per employee breakdown.

Why Use a PEO, and When Should You Skip One?

Use a PEO when you want HR, payroll and benefits outsourced together. If health insurance is the only reason you're looking, price other options first, because you may be paying an admin fee for services you don't need.

Four options are worth a quote before you sign a CSA. A small business group health plan in your own name, generally for employers with up to 50 employees (up to 100 in some states), lets you pick the carrier and plan. A level-funded plan pairs a fixed monthly payment with stop-loss insurance and may return a surplus in a good year, though groups are medically underwritten; KFF found 37% of covered workers at firms with 10–199 workers were in one in 2025. See how level-funded health plans work.

An ICHRA lets employers of any size reimburse individual premiums by employee class, and since September 3, 2026 it's also called a CHOICE Arrangement; see what an ICHRA is. A QSEHRA suits employers under 50 with no group plan, capped at $6,450 self-only and $13,100 family for 2026; see QSEHRA rules and limits.

Shopping all of these costs nothing: an employee benefits broker costs your business $0. Confirm the tax treatment of any option with your CPA or benefits attorney.

Keep Going